A study of sign adjustment in weighted signed networks

We analyse the adjustment of networks comprising of weighted positive (P) and negative (N) symmetric relations under the impact of various balancing rules. Five kinds of rules are studied: (1) a local minimal edge adjustment which is a special case of, (2) a local pressure based rule, (3) a local sign based rule, (4) a global rule and (5) rules varying on a local to global dimension. The convergence and convergent proportions of different 3-cycles and, thus the impact upon β(3) balance, under the different kinds of adjustment rule are studied both analytically and through simulation. The effects of network size (n), density (d) and the initial proportion of positive edges (α₀) upon the convergence of 3-cycles and, thus, balance and the eventual implications for the process of group formation are explored.     

One-mode projection analysis and design of covert affiliation networks

Within the field of national security and counterterrorism a great need exists to understand covert organizations. To better understand these cellular structures we model and analyze these cells as a collection of subsets of all participants in the covert organization, i.e., as hypergraphs or affiliation networks. Such a covert affiliation network structure is analyzed by evaluating the one-mode projection of the corresponding hypergraph. First we provide a characterization of the total distance in the one-mode projection using its corresponding cell-shrunken version. Secondly we evaluate the one-mode projection with respect to the secrecy versus information tradeoff dilemma every covert organization has to solve. We present and analyze affiliation networks representing common covert organizational forms: star, path and semi-complete hypergraphs. In addition we evaluate an example of a covert organization wishing to conduct an attack and compare its performance to that of the common covert organizational forms. Finally we investigate affiliation networks that are optimal in the sense of balancing secrecy and information. We show how any affiliation tree can be improved by altering its structure. Finally we prove that among covert organizational forms in the class of hypertrees with the same number of cells uniform star affiliation networks are optimal.     

Interventions with men who are violent to their partners: strategies for early engagement

Practitioners who view intimate partner violence as a set of strategies aimed at maintaining positions of power and privilege often face an engagement dilemma when men at their first contact talk of themselves as disempowered by circumstances such as separation, loss of access to children, legal problems, substance abuse issues, and their own history of being abused. This paper explores how a language-oriented approach to violence can assist practitioners in responding to abuser's current perceptions while avoiding collusion with justifications for violence. It examines common ways of speaking that men will employ to justify their violence then explores practical ways to identify and neutralized these messages before exploring personal opportunities for change.     

Re‐Forming the School: Taking Swedish Lessons

In the context of government decentralisation and integration of services, over the last 15 years Sweden has been developing an all‐day school based on inter‐professional teamworking and adopting a holistic approach to working with children. The article describes these recent educational reforms in Sweden, which have sought to re‐structure the school and develop new ways of working, offers some evaluative comments on this process and considers possible implications of these reforms for other countries. It compares Swedish school reforms with recent English policy developments intended to make ‘extended schools’ a universal provision by 2010.     

New Ways of Working: does flexibility in time and location of work change work behavior and affect business outcomes?

In the changing modern economy some new factors have been addressed that are of importance for productivity and economic growth, such as human skills, workplace organization, information and communication technologies (ICT) and knowledge sharing. An increasing number of companies and organizations are implementing measures to better address these factors, often referred to as 'the New Ways of Working (NWW)'. This consists of a large variety of measures that enable flexibility in the time and location of work. Expectations of these measures are often high, such as a reduction in operating costs and an increase of productivity. However, scientific proof is still lacking, and it is worth asking whether al these implementations actually cause a change in work behavior and effect business outcomes positively. This article describes a case study of three departments (total of 73 employees) that changed from a traditional way of working towards a new way of working. Questionnaires and a new developed objective measurement system called 'work@task' were used to measure changes in work behavior (i.e. increased variation in work location, work times and a change towards NWW management style) and the effect on business objectives such as knowledge sharing, employees satisfaction, and collaboration.     

The Rise of Three-Generation Households Among Households Headed by Two Parents and Mothers Only in Australia

This study offers knowledge about factors associated with a key type of family change, namely, two- to-three-generation household transformations, which are poorly understood, despite increasing numbers of three-generation households, especially ones headed by females. Using a representative sample of 5,874 Australian children, results showed that the circumstances of children in two-generation households differed greatly by family structure. Thus, before investigating determinants of three-generation household formation, children were first grouped as living in either two-parent or single-mother households. For both groups of children, several factors were found associated with three-generation household formation. In two-parent households, the odds of three-generation household formation decreased with mothers?? ages, fathers?? higher educational attainments, and more children, but increased as children grew older. In single-mother households, the odds of three-generation household formation decreased with mothers?? higher educational attainments, increasing income, and more children, but increased if mothers had never been married and worked more hours. Living in rural areas decreased odds of three-generation household formation for children in both types of households. Overall, grandparents appear to play a relatively more important resource role in three-generation, mother only households than in three-generation, two-parent households.     

Computer decision support tools in primary care

Computer Decision Support Tools (CDSTs) can support clinicians at various stages of the care process and improve healthcare, but implementation of these tools has been difficult. In this study we examine the need for, the use of, and barriers and facilitators to the use of a CDST from a human factor perspective. Results show that there is a need for CDSTs, and that physicians do use well-developed CDSTs. However, there are also barriers against the use, such usability issues and problems fitting them into the clinical workflow.     

Trust,perceptions of corruption,and demand for regulation: Evidence from post-socialist countries

While the tradeoff between market failure and government failure has been explored both theoretically and in practical policy design, the question of whether this trade-off appears in the calculus of citizens’ demands for government regulation remains underexplored. We first clarify the channels through which concerns for market failure, as proxied by trust in market participants, and concerns for government failure, as proxied by perceptions of corruption, jointly affect individuals’ demand for government regulation. We then investigate these effects empirically, using data from post-socialist countries. Our analysis confirms the previously established result that trust has a negative effect on demand for regulation. Perceived corruption, however, affects demand for regulation primarily via a negative interaction effect with trust. Our findings suggest that, in post-socialist countries, both concerns for market failure and concerns for government failure are indeed in citizens’ minds and that concerns about the anticipated ‘grabbing-hand’ effect from government involvement are particularly salient.     

Using human factors engineering to improve patient safety in the cardiovascular operating room

Despite significant medical advances, cardiac surgery remains a high risk procedure. Sub-optimal work system design characteristics can contribute to the risks associated with cardiac surgery. However, hazards due to work system characteristics have not been identified in the cardiovascular operating room (CVOR) in sufficient detail to guide improvement efforts. The purpose of this study was to identify and categorize hazards (anything that has the potential to cause a preventable adverse patient safety event) in the CVOR. An interdisciplinary research team used prospective hazard identification methods including direct observations, contextual inquiry, and photographing to collect data in 5 hospitals for a total 22 cardiac surgeries. We performed thematic analysis of the qualitative data guided by a work system model. 60 categories of hazards such as practice variations, high workload, non-compliance with evidence-based guidelines, not including clinicians' in medical device purchasing decisions were found. Results indicated that hazards are common in cardiac surgery and should be eliminated or mitigated to improve patient safety. To improve patient safety in the CVOR, efforts should focus on creating a culture of safety, increasing compliance with evidence based infection control practices, improving communication and teamwork, and designing better tools and technologies through partnership among all stakeholders.